The reason is because both executing tracing and method-based JIT are useful, but only Firefox has execution tracing, and only v8 has the other optimizations. The idea is to write an engine that does both.
Seems like WebKit should be able to use this code when it's working; Mozilla is GPL/LGPL/MPL, and WebKit is LGPL.
Seems like WebKit should be able to use this code when it's working; Mozilla is GPL/LGPL/MPL, and WebKit is LGPL.